Piston for internal-combustion engines



May 3 1927. 1,626,838

O. E. JORGENSEN PISTON FOR INTERNAL COMBUSTION ENGINES Filed Feb. 1926 OLAV E. jORGrENivE-N i wventoz 85, his fitter/14015 m7 Patented May 3, 1927.

UNITED STATES PATENT OFFICE.

OLAV ESKIL J ORGEN SEN, 0]! FOREST HI LL S, NEW YORK, ASSIGNOR TO-WORTHINGTON PUMP AND MACHINERY CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF VIRGIN I A.

PISTON FOR INTERNAL-COMBUSTION ENGINES.

Application filed February This invention relates to internal combustion engines and more particularly to a piston structure for double-acting,two-cycle oil-burning engines.

An object 01, the present invention is to provide a piston made up of a plurality of parts, facilitating its manufacture, which parts are rigidly connected by bolts contained within the walls of the piston structure and further to provide a piston in which the piston rod is enlarged to upset to equal diameter with the piston body to form the lower end or head of the piston.

Another object of the invention is to provide a piston as specified in which all the joints are arranged and the under surface of the lower head of the piston is shaped to receive the impact or pressure of explosion in a double-acting engine in such manner as to relieve all of the joints of the piston of pressure and shearing action during operation of the engine.

With these objects in view, the invention consists in Various features of construction and combination of parts, which will be first described in connection with the accompanying drawings, showing a piston for internal combustion engines of the preferred form embodyingthe invention, and the features forming the invention will be specifically pointed out in the claims.

In the drawings- I Figure 1 is a longitudinal section through an improved piston,

Figure 2 is a cross section through the piston taken on the line 2--2 of Figure 1. Figure 3 is a longitudinal section through a modified form of the piston.

Referring more particularly to the drawings, the improved piston is shown as comprising a piston rod 1 which, when the pismn rod is made of forged steel of analogous metal has its upper end upset to form the lower piston head '2. If the piston rod is cast the upper end of the piston rod may be extended in any suitable manner to form the lower piston head 2. The lower piston head 2 has an annular shoulder 3 formed on its upper end which fits against the annular shoulder 4 formed on the lower end of the piston body 5. The perimeter of the lower head 2 is flush with the perimeter of the outer surface of the cylinder body 5, and it has its under surface shaped to receive the 18, 1926. Serial N0. 89.081.

impact or pressure of explosion in a doubleacting engine and to permit proper clearance through the ports of a cylinder with which it is used. The construction just described will also prevent the loading of any of the joints of the piston by pressure dur- 1ng the operation of the engine and will consequently relieve them of strain and increase the longevity of the engine. The piston body 5 is in the form of an open-ended cylinder and it has an annular thickened porprovided with inter-locking shoulders 14:

and 15 respectively. The upper ends of the bolts 8 and the lower ends of the bolts '9 extend into the recesses 7, and clamping nuts 16 are threaded on these respective ends of the bolts forv tightly clamping and connect-- ing the body 5 of the piston to the lower head 2 and upper head 12.

The body 5 is provided with the annular groove 17 which registers with the recesses 7 and a plurality of piston rings 18 are placed in the groove 17 and form closures for the recesses 7 to prevent the scavenging air fromentering the recesses and passing froin one recess to the other.

A flanged collar 20 is welded on the cool- I ing fluid conducting pipe 21. The cooling fluid passes upwardly through the pipe 21 out of its upper end and downwardly through the interior of the piston, passing through the openings 24 into the space 25,

within the piston rod 2, and thus to the supply source or other discharge. v

If it is so desired the head 12 may be formed integral with the body 5 as shown in the modified form illustrated in Figure 3. In this modified structure, the body 5 is connected by bolts 8 to the enlarged end 2 of the piston rod 1 and the nuts 16 are placed within the ring closed recesses 7 It will be understood that the inventionfis f not limited to the specific constructions or arrangement of parts shhwn but that these may be modified widely within the invention defined by the claims.

What I claim is:

1. A piston including a piston body forming the entire side wall of the piston, a piston rod having one end upset to the full diameter ofthe iston body to form one end only of the plston, and means connect-i ing1 the body and the upset end of the piston ro 2. A piston including a piston body, a piston rod having one end upset to the full diameter of the body to form one end of the piston, and bolts extending through the wall of the body and threaded into said upset end.-

3. A piston including a piston/ body, a

head, a piston rod having one end upset to" the full diameter of the body to form one end of the piston, bolts extending through the Wall of the body parallel with its axis and threaded into the head and upset end.

4;. A piston including a piston body, a

95 head, a piston rod having one end upset to the full diameter of the body to form one end of, the piston, bolts extending through the wall of the bod parallel with its axis and threaded into the head and upset end, said body provided with recesses to permit access to said bolts, and piston rings carried by the body and forming closures for said recesses.

5. A piston for internal combustion engines including a piston body, a piston rod having one end upset to the full diameter of the bod to form one end of the piston, a head, said odyhaving tight surface engagement at its ends with the ends of the head and u set end to prevent loading of any of the joints of the piston by pressure during operation, bolts extending through the wall of the body parallel with its axis and threaded into the head and upset end said body provided with recesses to permit access to said bolts,,and piston rings carried by the body and forming closures for said. recesses.

In testimony whereof I atfix my signature.

OLAV ESKIL J ORGENSEN 

